The Scotland international bagged our third of the game in a thumping 4-1 win, netting her second goal against Manchester United in successive games, having scored a sensational chipped winner in the league encounter before the international break.
Her latest strike – a low drive that squeezed in at Mary Earps’ near post – marked her fourth against the Reds and the delighted 26-year-old admitted she blossoms on the occasion of Derby Day.
“You can’t really beat a Derby!” she smiled. “In Manchester, you are either a Blue or a Red and I think we thrive on the atmosphere. The fans make it what it is.
“Personally, I love a Derby. You love to win and we have done it again.”
Though Gareth Taylor’s side recorded a stunning triumph, the visitors did not have it all our own way, falling behind to Katie Zelem’s early opener – straight from a corner.
Inspired by the manager's half-time team talk and the impactful introductions of substitutes Weir, Hayley Raso, Julie Blakstad and Khadija ‘Bunny’ Shaw, City produced a ruthless second half display to turn the tie on its head in emphatic fashion.
Weir admitted the half-time scrum yielded plenty of discussion with the need for improvement after the break.
“United made it difficult for us in the first half,” she conceded, “and obviously they got the goal.
“We knew it was going to be difficult – it’s always hard coming here.
“At half-time, we just spoke about making sure we did the right things, upping the tempo.
“We did that in the second half and got the rewards in the end.”
With a place in the last eight of the FA Cup, the competition is heating up.
Three-time winners City will be hoping to secure the silverware for a fourth time since 2017 and although there is a long way to go in the tournament, Weir says the thought of another Wembley trip provided plenty of inspiration for the players.
“The FA Cup is massive,” she added. “The Final is always at the end of the season and it’s something to look forward to.
“We want to be up there, competing for a trophy, and it doesn’t get much bigger than the FA Cup.
“That’s always in our head going into a massive FA Cup game like this one.
“Hopefully, we will get there but there are still a few games to go!”